Alert archive / Pennsylvania / York County
Weather alerts in York County, Pennsylvania, 2024
168 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
York County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 168
- Warnings
- 38
- Watches
- 25
- Advisories
- 50
- Busiest month
- August42 alerts
- Busiest day
- August 9, 202412 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering York County in 2024 had a tornado report inside them.
York County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 22 | 21 | 5% | 24 | 75% | 18 min |
| Flash flood warnings | 4 | 3 | 25% | 3 | 100% | 64 min |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 16 | 0 | 100% | 4 | 0% | |
| NWS State College, PA: severe thunderstorm warnings | 188 | 125 | 34% | 422 | 74% | 20 min |
| NWS State College, PA: flash flood warnings | 33 | 23 | 30% | 65 | 78% | 59 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 4, 2:29 PM EST | Winter Storm Watch | CTP | 22 hr |
| Jan 5, 12:23 PM EST | Winter Weather Advisory | CTP | 34 hr |
| Jan 6, 11:47 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 8, 2:14 AM EST | Flood Watch | CTP | 49 hr |
| Jan 8, 4:08 AM EST | Wind Advisory | CTP | 62 hr |
| Jan 9, 6:00 PM EST | Areal Flood Advisory | CTP | 3 hr |
| Jan 9, 8:35 PM EST | River Flood Warning | CTP | 31 hr |
| Jan 9, 9:27 PM EST | Areal Flood Warning | CTP | 7 hr |
| Jan 12, 4:14 AM EST | Wind Advisory | CTP | 41 hr |
| Jan 14, 2:34 AM EST | Wind Advisory | CTP | 14 hr |
| Jan 14, 9:58 AM EST | Special Weather Statement | CTP | 92 min |
| Jan 15, 4:01 AM EST | Winter Weather Advisory | CTP | 34 hr |
| Jan 15, 10:59 PM EST | Winter Storm Warning | CTP | 13 hr |
| Jan 18, 4:25 AM EST | Winter Weather Advisory | CTP | 66 hr |
| Jan 24, 1:31 PM EST | Special Weather Statement | CTP | 89 min |
| Jan 24, 5:45 PM EST | Dense Fog Advisory | CTP | 16 hr |
| Jan 25, 10:43 AM EST | Dense Fog Advisory | CTP | 22 hr |
| Feb 10, 2:46 PM EST | Winter Storm Watch | CTP | 48 hr |
| Feb 12, 2:15 PM EST | Winter Weather Advisory | CTP | 21 hr |
| Feb 15, 6:30 PM EST | Winter Storm Watch | CTP | 19 hr |
| Feb 16, 1:39 PM EST | Winter Storm Warning | CTP | 17 hr |
| Feb 16, 10:33 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 27, 2:47 PM EST | Wind Advisory | CTP | 37 hr |
| Mar 9, 3:20 AM EST | Wind Advisory | CTP | 62 hr |
| Mar 22, 1:02 PM EDT | Flood Watch | CTP | 25 hr |
| Apr 1, 2:08 PM EDT | Flood Watch | CTP | 60 hr |
| Apr 4, 5:27 PM EDT | Special Weather Statement | CTP | 33 min |
| Apr 12, 10:25 AM EDT | Wind Advisory | CTP | 32 hr |
| Apr 15, 3:37 PM EDT | Severe Thunderstorm Warning | CTP | 23 min |
| Apr 15, 4:00 PM EDT | Severe Thunderstorm Warning | CTP | 60 min |
| Apr 21, 11:54 AM EDT | Frost Advisory | CTP | 20 hr |
| Apr 22, 9:45 AM EDT | Frost Advisory | CTP | 22 hr |
| Apr 25, 1:32 PM EDT | Frost Advisory | CTP | 18 hr |
| May 6, 3:00 AM EDT | Dense Fog Advisory | CTP | 7 hr |
| May 7, 6:25 AM EDT | Dense Fog Advisory | CTP | 3 hr |
| May 8, 4:49 AM EDT | Special Weather Statement | CTP | 41 min |
| May 22, 3:00 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 22, 4:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 23, 8:49 PM EDT | Special Weather Statement | CTP | 11 min |
| May 23, 8:58 PM EDT | Severe Thunderstorm Warning | CTP | 47 min |
| May 26, 12:09 AM EDT | Dense Fog Advisory | CTP | 10 hr |
| May 27, 12:13 AM EDT | Special Weather Statement | CTP | 32 min |
| May 27, 12:42 AM EDT | Special Weather Statement | CTP | 33 min |
| May 27, 11:53 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 27, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 29, 5:45 PM EDT | Special Weather Statement | CTP | 15 min |
| Jun 5, 6:32 PM EDT | Special Weather Statement | CTP | 58 min |
| Jun 5, 7:59 PM EDT | Special Weather Statement | CTP | 46 min |
| Jun 5, 10:12 PM EDT | Areal Flood Advisory | CTP | 78 min |
| Jun 14, 2:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 16, 3:20 PM EDT | Heat Advisory | CTP | 7 days |
| Jun 22, 4:59 PM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| Jun 22, 5:34 PM EDT | Special Weather Statement | CTP | 26 min |
| Jun 23, 3:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 4:33 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 26, 4:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 26, 5:21 PM EDT | Special Weather Statement | CTP | 39 min |
| Jun 26, 5:31 PM EDT | Severe Thunderstorm Warning | CTP | 44 min |
| Jun 26, 9:57 PM EDT | Severe Thunderstorm Warning | CTP | 33 min |
| Jun 26, 11:15 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jun 29, 1:11 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 29, 4:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 29, 6:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 29, 6:44 PM EDT | Severe Thunderstorm Warning | CTP | 46 min |
| Jun 29, 7:48 PM EDT | Special Weather Statement | CTP | 27 min |
| Jun 30, 11:09 AM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 30, 4:12 PM EDT | Special Weather Statement | CTP | 18 min |
| Jun 30, 4:31 PM EDT | Severe Thunderstorm Warning | CTP | 44 min |
| Jul 5, 2:48 AM EDT | Heat Advisory | CTP | 41 hr |
| Jul 7, 2:40 PM EDT | Heat Advisory | CTP | 3 days |
| Jul 10, 12:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 10, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 10, 4:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 13, 2:42 AM EDT | Excessive Heat Watch | CTP | 35 hr |
| Jul 13, 2:42 AM EDT | Heat Advisory | CTP | 4 days |
| Jul 14, 1:54 PM EDT | Excessive Heat Warning | CTP | 54 hr |
| Jul 14, 2:25 PM EDT | Special Weather Statement | CTP | 35 min |
| Jul 15, 10:56 AM EDT | Heat Advisory | CTP | 57 hr |
| Jul 15, 3:30 PM EDT | Severe Thunderstorm Warning | CTP | 10 min |
| Jul 15, 3:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 4:28 PM EDT | Special Weather Statement | CTP | 32 min |
| Jul 15, 4:37 PM EDT | Special Weather Statement | CTP | 23 min |
| Jul 15, 4:38 PM EDT | Special Weather Statement | CTP | 22 min |
| Jul 15, 4:48 PM EDT | Severe Thunderstorm Warning | CTP | 27 min |
| Jul 16, 2:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 16, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 16, 6:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 16, 6:48 PM EDT | Severe Thunderstorm Warning | CTP | 42 min |
| Jul 16, 6:54 PM EDT | Severe Thunderstorm Warning | CTP | 36 min |
| Jul 16, 7:28 PM EDT | Severe Thunderstorm Warning | CTP | 77 min |
| Jul 16, 8:20 PM EDT | Areal Flood Advisory | CTP | 100 min |
| Jul 16, 8:44 PM EDT | Severe Thunderstorm Warning | CTP | 46 min |
| Jul 17, 12:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 12:58 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 17, 3:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 17, 6:13 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Jul 17, 6:18 PM EDT | Severe Thunderstorm Warning | CTP | 42 min |
| Jul 17, 7:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 12:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 4:17 AM EDT | Heat Advisory | CTP | 64 hr |
| Aug 1, 2:43 PM EDT | Special Weather Statement | CTP | 32 min |
| Aug 1, 2:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 7:58 PM EDT | Special Weather Statement | CTP | 32 min |
| Aug 2, 8:28 PM EDT | Special Weather Statement | CTP | 17 min |
| Aug 3, 12:14 PM EDT | Flood Watch | CTP | 9 hr |
| Aug 3, 12:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 3, 1:20 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 3, 2:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Aug 3, 3:40 PM EDT | Special Weather Statement | CTP | 50 min |
| Aug 3, 5:01 PM EDT | Severe Thunderstorm Warning | CTP | 44 min |
| Aug 3, 5:26 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Aug 6, 11:42 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 6, 2:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 6, 2:54 PM EDT | Flood Watch | CTP | 13 hr |
| Aug 6, 3:16 PM EDT | Areal Flood Advisory | CTP | 119 min |
| Aug 6, 3:52 PM EDT | Severe Thunderstorm Warning | CTP | 38 min |
| Aug 6, 4:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Aug 6, 6:30 PM EDT | Severe Thunderstorm Warning | CTP | 45 min |
| Aug 6, 6:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 6, 10:48 PM EDT | Areal Flood Advisory | CTP | 117 min |
| Aug 7, 3:24 PM EDT | Flood Watch | CTP | 48 hr |
| Aug 8, 11:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 9, 4:30 AM EDT | Flash Flood Warning | CTP | 99 min |
| Aug 9, 4:38 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 9, 6:17 AM EDT | Tornado Watch | SPC | 8 hr |
| Aug 9, 7:27 AM EDT | River Flood Warning | CTP | 21 hr |
| Aug 9, 8:27 AM EDT | Tornado Warning | CTP | 33 min |
| Aug 9, 8:34 AM EDT | Areal Flood Warning | CTP | 7 hr |
| Aug 9, 8:44 AM EDT | Flash Flood Warning | CTP | 2 hr |
| Aug 9, 9:18 AM EDT | Flash Flood Warning | CTP | 117 min |
| Aug 9, 10:07 AM EDT | Flash Flood Warning | CTP | 113 min |
| Aug 9, 10:26 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 9, 12:06 PM EDT | Areal Flood Warning | CTP | 3 hr |
| Aug 17, 4:59 AM EDT | Flood Watch | CTP | 42 hr |
| Aug 18, 1:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 18, 2:02 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 18, 4:29 PM EDT | Areal Flood Advisory | CTP | 91 min |
| Aug 18, 4:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 18, 5:53 PM EDT | Areal Flood Advisory | CTP | 112 min |
| Aug 18, 8:34 PM EDT | Severe Thunderstorm Warning | CTP | 39 min |
| Aug 27, 4:05 AM EDT | Heat Advisory | CTP | 40 hr |
| Aug 29, 5:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Sep 21, 10:52 PM EDT | Areal Flood Advisory | CTP | 2 hr |
| Sep 21, 10:53 PM EDT | Severe Thunderstorm Warning | CTP | 52 min |
| Sep 21, 11:40 PM EDT | Severe Thunderstorm Warning | CTP | 50 min |
| Sep 22, 12:21 AM EDT | Special Weather Statement | CTP | 54 min |
| Sep 22, 12:36 AM EDT | Areal Flood Advisory | CTP | 91 min |
| Sep 22, 1:08 AM EDT | Severe Thunderstorm Warning | CTP | 22 min |
| Sep 22, 1:18 AM EDT | Areal Flood Advisory | CTP | 89 min |
| Oct 14, 2:34 PM EDT | Frost Advisory | CTP | 18 hr |
| Oct 15, 12:36 PM EDT | Frost Advisory | CTP | 20 hr |
| Oct 16, 1:44 PM EDT | Frost Advisory | CTP | 19 hr |
| Oct 18, 3:03 PM EDT | Frost Advisory | CTP | 17 hr |
| Oct 19, 2:08 PM EDT | Frost Advisory | CTP | 19 hr |
| Oct 24, 2:24 PM EDT | Frost Advisory | CTP | 19 hr |
| Oct 26, 3:21 AM EDT | Freeze Watch | CTP | 24 hr |
| Oct 26, 10:52 AM EDT | Frost Advisory | CTP | 22 hr |
| Oct 27, 2:56 AM EDT | Freeze Warning | CTP | 30 hr |
| Nov 1, 4:09 AM EDT | Fire Weather Watch | CTP | 6 hr |
| Nov 1, 9:53 AM EDT | Red Flag Warning | CTP | 9 hr |
| Nov 7, 1:57 PM EST | Red Flag Warning | CTP | 28 hr |
| Nov 20, 11:28 AM EST | Wind Advisory | CTP | 14 hr |
| Dec 3, 2:37 PM EST | Wind Advisory | CTP | 52 hr |
| Dec 5, 3:55 AM EST | Special Weather Statement | CTP | 65 min |
| Dec 9, 9:44 PM EST | Dense Fog Advisory | CTP | 11 hr |
| Dec 23, 4:28 PM EST | Winter Weather Advisory | CTP | 27 hr |
| Dec 28, 5:40 PM EST | Dense Fog Advisory | CTP | 15 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.